/Engine/Source/Runtime/Landscape/Public/LandscapeEdit.h
Misc.
bool GetComponentsInRegion ( int32 X1, int32 Y1, int32 X2, int32 Y2, [TSet](API\Runtime\Core\Containers\TSet)< [ULandscapeComponent](API\Runtime\Landscape\ULandscapeComponent) * > * OutComponents )